Collector



Aug. 6, 1940.

E. E. THWAITES COLLECTOR Filed March 7, 1938 Patented Ayg. 6, 1940 v vUNITED smms PTENTOFFICE the housing 6 outside of the compartment I1, thefoul air passing through the sack 22 and escaping but being deodorizedand purified by the contents of said sack.

The valve 24 is also opened when teeth are being cleaned, or grinding isdone on base metals, porcelain, or similar materials. The lining I6therefore remains free of worthless dust. It is obvious that passage ofair through the lining IE will carry a slight portion of the Valuabledust through the lining, so it is important that the unnecessary air beby-passed by the valve 24. By-passing the air also gives the air lessflow resistance, and the electric motor uses less power.

When it is desired to remove the hood containing the particles ofmaterial to be recovered, the front screws 9 may be removed and thenozzle 1 detached. The rear screws 9 may be then removed and the fanassembly including the motor and the hood then withdrawn and the clamp 9taken off thus permitting the removal of the hood for the recovery ofthe contents thereof and thereupon the removed parts may be replaced inan obvious manner.

The drawing and description disclose what is now considered to be apreferred form of the invention by way of illustration only while thebroad principle of the invention will be defined by the appended claim.

'What I claim is:

In a collector; an inlet air conduit, a nest of filtering chambersformed consecutively one within the other, one of said chambers having adeodorizing agent on the walls thereof, means between the chambers andthe conduit whereby air may be conducted from the conduit to one or bothof the filtering chambers.

EARL E. TI-IWAITES.

